import axios from 'axios'
import {ElMessage} from 'element-plus'
import JSONBig from "json-bigint"

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
    // axios中请求配置有baseURL选项，表示请求URL公共部分,网关的URL
    baseURL: "http://localhost:10010/swiftride",
    // 超时
    timeout: 10000,
    transformResponse: [function (data) {
        //处理大数字精度问题  122222222222222222222000
        return JSONBig.parse(data);
    }]
})

// request拦截器
service.interceptors.request.use(config => {
    let tokenName = localStorage.getItem("tokenName");
    let tokenValue = localStorage.getItem("tokenValue");
    if (tokenName && tokenValue) {
        config.headers[tokenName] = tokenValue;
    }
    // get请求映射params参数
    if (config.method === 'get' && config.params) {
        let url = config.url + '?' + tansParams(config.params);
        url = url.slice(0, -1);
        config.params = {};
        config.url = url;
    }
    return config
}, error => {
    return Promise.reject(error);
})

// 响应拦截器
service.interceptors.response.use(res => {
        // 未设置状态码则默认成功状态
        const code = res.data.code || 200;

        if (code === 401) {
            return Promise.reject(new Error('无效的会话，或者会话已过期，请重新登录。'));
        } else if (code === 500) {
            return Promise.reject(new Error(res.data.message || '服务器内部错误'));
        } else if (code !== 200) {
            return Promise.reject(new Error(res.data.message || '请求失败'));
        } else {
            return res.data;
        }
    }, error => {

        let {message} = error;
        if (message === "Network Error") {
            message = "后端接口连接异常";
        } else if (message.includes("timeout")) {
            message = "系统接口请求超时";
        } else if (message.includes("Request failed with status code")) {
            message = "系统接口异常[" + message + "]";
        }
        ElMessage({type: "error", message: message,})
        return Promise.reject(error)
    }
)


/**
 * 参数处理
 * @param {*} params  参数
 */
export function tansParams(params) {
    let result = '';
    for (const propName of Object.keys(params)) {
        const value = params[propName];
        const part = encodeURIComponent(propName) + "=";
        if (value !== null && value !== "" && typeof (value) !== "undefined") {
            if (typeof value === 'object') {
                for (const key of Object.keys(value)) {
                    if (value[key] !== null && value[key] !== "" && typeof (value[key]) !== 'undefined') {
                        let params = propName + '[' + key + ']';
                        const subPart = encodeURIComponent(params) + "=";
                        result += subPart + encodeURIComponent(value[key]) + "&";
                    }
                }
            } else {
                result += part + encodeURIComponent(value) + "&";
            }
        }
    }
    return result;
}

export default service
